Elite Membership--Can I use plugins for client websites?

Can I use plugins for client websites?

For example, I installed the WPMU DEV Dashboard on my personal domain and noticed that it seems a bit easy to access my account and change password.

So if I want to use the WPMU DEV Dashboard on my clients domains then they would also have this type of access correct?

So first, is it allowed themes on clients domains?
If so, what's the best solution? Don't add the WPMU DEV Dashboard when I install plugins?
Is there a way to install the WPMU DEV Dashboard for updates without giving them so much access such as editing account information....

Thanks,

Jenn